The specific operation is: the alloy block placed in the bottom of the package, covered with iron filings (also available thin steel plate). When the molten iron is filled, stir the molten iron with a whisk (accelerated reaction) and immediately add straw ash to the molten iron (reduce thermal radiation and oxidation). When the ball reaction will end, use the sample spoon to remove some molten iron, pouring into the specimen, water cooled after solidification, break, check the section to determine the degree of the ball. When the requirement is reached, the molten iron is poured into the ladle and cast. The metal is melted into a certain required liquid and poured into the mold, and the process of casting (parts or blanks) with predetermined shape, size and performance is obtained after cooling, solidification and scrubbed treatment. The basic technology of modern machinery manufacturing industry. The blank cost of casting production is low, and it is more economical for the complicated shape, especially the parts with complex cavities, and it has a wide adaptability and good comprehensive mechanical properties.
But the materials required for casting production (such as metals, wood, fuel, modelling materials, etc.) and equipment (such as metallurgical furnaces, sand mixer, molding machine, core-making machine, sand machine, shot blasting machine, etc.) more, and will produce dust, harmful gases and noise and pollute the environment.